package org.rk.core.common.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;

@Configuration
public class RKAppConfig  implements  DisposableBean, InitializingBean, ApplicationContextAware {
	
	
	private static ApplicationContext appContext; 
	
	public static ApplicationContext getCtx() {
		if(RkObjectUtil.isEmpty(RKAppConfig.appContext)){
			RKAppConfig.appContext = new AnnotationConfigApplicationContext();
			//RKAppConfig.appContext=new ClassPathXmlApplicationContext("applicationContext.xml");
		}
        return RKAppConfig.appContext;  
    } 
	
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if(RkObjectUtil.isEmpty(applicationContext)){
			RKAppConfig.appContext=new AnnotationConfigApplicationContext();
		}else{
			RKAppConfig.appContext=applicationContext;
		}
	}

	@Override
	public void afterPropertiesSet() throws Exception {
		
	}

	@Override
	public void destroy() throws Exception {
		
	}
	
	/**
	 * @方法描述：以所给名字注册的bean的实例
	 * @author:Cavion(曹仁道)
	 * @param name
	 * @return
	 * @throws BeansException
	 * 2017年1月13日
	 */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) getCtx().getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     *
     * @param clz
     * @return
     * @throws org.springframework.beans.BeansException
     *
     */
    public static <T> T getBean(Class<T> clz) throws BeansException {
        T result = (T) getCtx().getBean(clz);
        return result;
    }
    public static <T> T getBean(Class<T> clazz,String name) throws NoSuchBeanDefinitionException {
    	return getCtx().getBean(name, clazz);
    }
    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     *
     * @param name
     * @return boolean
     */
    public static boolean containsBean(String name) {
        return getCtx().containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     *
     * @param name
     * @return boolean
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return getCtx().isSingleton(name);
    }

    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return getCtx().getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     *
     * @param name
     * @return
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     *
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return getCtx().getAliases(name);
    }

}
